Y. W. Yu

Resonating group method study of kaon-nucleon elastic scattering in the chiral SU(3) quark model

The chiral SU(3) quark model is extended to include an antiquark in order to study the kaon-nucleon system. The model input parameters b{sub u}, m{sub u}, m{sub s} are taken to be the same as in our previous work which focused on the nucleon-nucleon and nucleon-hyperon interactions. The mass of the scalar meson {sigma} is chosen to be 675 MeV and the mixing of {sigma}{sub 0} and {sigma}{sub 8} is considered. Using this model the kaon-nucleon S and P partial waves phase shifts of isospin I=0 and I=1 have been studied by solving a resonating group method equation. The numerical results of S{sub 01}, S{sub 11}, P{sub 01}, P{sub 03}, and P{sub 11} partial waves are in good agreement with the experimental data while the phase shifts of P{sub 13} partial wave are a little bit too repulsive when the laboratory momentum of the kaon meson is greater than 500 MeV in this present calculation.

Study on N anti-Omega systems in a chiral quark model

The N{omega} systems with spin S=1 and S=2 are dynamically investigated in the chiral SU(3) quark model and the extended chiral SU(3) quark model by solving the equation in the framework of the resonating group method (RGM). The model parameters are taken from our previous work, which gave a good description of the energies of the baryon ground states, the binding energy of deuteron, and the experimental data of the nucleon-nucleon (NN) and nucleon-hyperon (NY) scattering processes. The results show that N{omega} states with spin S=1 and S=2 can be bound in both the chiral SU(3) and the extended chiral SU(3) quark models, and the binding energies are about 28-59 MeV. When the s-channel interaction is considered, the binding energies increase to about 37- 130 MeV, which indicates that the effect of s-channel interaction plays a relatively important role in forming a N{omega} bound state. At the same time, the N{omega} elastic scattering processes are also studied, and the S,P,D partial wave phase shifts and the total cross sections of S=1 and S=2 channels are obtained.

Preliminary study of the K N interaction in a chiral constituent quark model

A preliminary investigation of

Coupled-channels study of Λ K and Σ K states in the chiral SU(3) quark model

\overline{K}N

A possible Ωπ molecular state

interaction is performed within a chiral constituent quark model by solving the resonating group method (RGM) equation. The model parameters are taken from our previous work, which gave a satisfactory description of the

N phi state in chiral quark model

S

Nϕstates in a chiral quark model

-,

NKπmolecular state withJπ=32−andI=1

P

Coupled-channels study ofΛKandΣKstates in the chiral SU(3) quark model

-,

N K Pi molecular state with I=1 and J(Pi)=3/2-

D